The most common and most likely answer to this crossword clue is the 7 letter word BITTERN
I've seen this crossword clue in Financial Times
B
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T
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More clues leading to the result BITTERN
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The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does BITTERN mean?
BITTERN noun- Several bird species in the Botaurinae subfamily of the heron family Ardeidae.
- The liquor remaining after halite (common salt) has been harvested from saline water (brine).
- The saline substance added to soy milk to coagulate it as a primary step in the production of tofu.
- A very bitter compound of quassia, cocculus indicus, etc., used by fraudulent brewers in adulterating beer.